Will my poor GPA make it impossible to get into nursing school?

Thank you everyone for your insight! My ultimate goal is obviously to become an RN, but as of right now I am 24 with a 3 year old and an 8 month old. I really don't want to miss all of their precious moments while they are small, so I was looking into becoming an LPN first, working for a couple years, then going back for my RN. But now it seems pointless to put all of my time and energy into an LPN program, when I can be going forward with getting my RN. High school was rough for me, moved around a lot, had some issues, and didn't apply myself like I should have. But now that I have two beautiful babies, everytime I look at them I think about their future and how I don't want them to ever be in the position I am in now. My CNA class I was at the top of the class with a 98%. So I am thinking about asking the LPN program if they would consider allowing me to take the entrance exam anyways, and show them my CNA certificate. I have more determination now than ever. Thank you all so much for your wonderful advice!